idle on my accord revs on its own when on park or neutral???

[freaknpr1288]

i just became a member today and i was wondering wat that problem could be.....nebody have an answer????...everytime i put my car in park or neutral my engine revs on its own.....how do i fix that????

[BootlegCB7]

idle air control valve or fast idle depends on when it happens, if it only happens when the engine is hot, it is very likely fast idle. Take the iacv off first and clean it see if it helps.

[12gage]

i also had erratic idle, but the valve didnt help. It ended up in the end to be that my alternator belt was too tight

[verderacer]

I know its not Honda but IAC on Alfa Romeo and BMW, anything Bosch J-Jetronic which is similar, were notorious for this. The only other one I can think of is a sensor. Check to see if you have any error codes...

[hibbs11]

Mine does this when first started. What could that be?

[jhnyct]

If it stops when the coolant comes up to temperature, it is very likely the fast idle valve needs to be adjusted. Mine used to do this. I replaced the IAC and it didn't fix it.

[PHX93EX]

Im not positive about this but Ive heard from a credible source that it could be a bad timig belt. My freind has told me that as the timing belt gets old it stetches and thus it is never "in time" with the rest of the engine. Have you ever had it replaced?

[Chrisisiced]

Could be either those valves need to be cleaned or adjusted OR you could have a vacuum leak somewhere......

[71_307]

if your power steering leaks it will cause that to happen also.

[1990AccordBoy]

the cars are equpt with a fast idle.. when ur turn ur car on and ur engine is not up to temp, it'll rev up 1500 rpm+ higher and higher til about like 1800-1900ish and then slowly work its way down and thats like a warm up feature.. but if it just jumps randomly, adjust ur fast idle vavle, but sometimes if u just turn ur car on and shift to R or D and u drive a lil brake, put it into N or P it'll jump back up because its still not warm enough...

[HondaFan81]

You need to provide more information. Exactly what type of Accord do you have. What year, what trim (DX, LX, EX or SE), what type of tranny, mileage. Any other details to the problem? Did this happen after some recent work was done? If so, what was done, etc. What has been done to fix the problem thus far and if any components have been replaced?

[quickangel93]

small vacuum leak somewhere.